/* ─────────────────────────────────────────────────────────────────────────── */
/*  TICNES Academic Integrity Audit System — Design System                     */
/* ─────────────────────────────────────────────────────────────────────────── */

:root {
  --bg-base:      #0B0D17;
  --bg-panel:     #111420;
  --bg-card:      #161928;
  --bg-input:     #1A1E30;
  --bg-hover:     #1E2235;

  --border:       rgba(99,102,241,0.18);
  --border-light: rgba(255,255,255,0.06);

  --purple:       #6C63FF;
  --blue:         #3B82F6;
  --cyan:         #06B6D4;
  --amber:        #F59E0B;
  --red:          #EF4444;
  --green:        #22C55E;
  --orange:       #F97316;

  --text-primary: #F0F2FF;
  --text-sec:     #9BA3C6;
  --text-muted:   #5B6280;

  --risk-critical: #EF4444;
  --risk-high:     #F97316;
  --risk-medium:   #F59E0B;
  --risk-low:      #22C55E;

  --radius:    14px;
  --radius-sm:  8px;
  --radius-lg: 20px;
  --shadow:    0 4px 32px rgba(0,0,0,0.45);
  --shadow-sm: 0 2px 12px rgba(0,0,0,0.3);

  --font-main: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

/* RESET */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* SCROLLBAR */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: rgba(108,99,255,0.4); border-radius: 3px; }

/* ─── TYPOGRAPHY ─────────────────────────────────────────────────────────── */
h1, h2, h3 { font-weight: 700; letter-spacing: -0.02em; line-height: 1.2; }
.gradient-text {
  background: linear-gradient(135deg, #6C63FF 0%, #3B82F6 40%, #06B6D4 80%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ─── HEADER ─────────────────────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11,13,23,0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand-logo { flex-shrink: 0; }
.brand-name { display: block; font-size: 17px; font-weight: 800; letter-spacing: -0.03em; }
.brand-sub  { display: block; font-size: 11px; color: var(--text-sec); letter-spacing: 0.04em; text-transform: uppercase; }
.header-meta { display: flex; align-items: center; gap: 16px; }
.header-date { font-size: 12px; color: var(--text-sec); font-family: var(--font-mono); }

/* ─── BADGES ─────────────────────────────────────────────────────────────── */
.badge {
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.badge-official {
  background: rgba(239,68,68,0.15);
  color: #FCA5A5;
  border: 1px solid rgba(239,68,68,0.3);
}
.badge-critical { background: rgba(239,68,68,0.15);  color: #FCA5A5;  border: 1px solid rgba(239,68,68,0.35); }
.badge-high     { background: rgba(249,115,22,0.15); color: #FDBA74;  border: 1px solid rgba(249,115,22,0.35); }
.badge-medium   { background: rgba(245,158,11,0.15); color: #FCD34D;  border: 1px solid rgba(245,158,11,0.35); }
.badge-low      { background: rgba(34,197,94,0.15);  color: #86EFAC;  border: 1px solid rgba(34,197,94,0.35); }

/* ─── HERO ───────────────────────────────────────────────────────────────── */
.hero {
  background: linear-gradient(135deg, rgba(108,99,255,0.08) 0%, rgba(59,130,246,0.05) 50%, transparent 100%);
  border-bottom: 1px solid var(--border);
  padding: 72px 32px 56px;
}
.hero-inner { max-width: 900px; margin: 0 auto; text-align: center; }
.hero-tag {
  display: inline-block;
  background: rgba(108,99,255,0.15);
  border: 1px solid rgba(108,99,255,0.35);
  color: #A5B4FC;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 6px 18px;
  border-radius: 999px;
  margin-bottom: 24px;
}
.hero-title { font-size: clamp(36px, 5vw, 56px); font-weight: 900; margin-bottom: 20px; }
.hero-desc { font-size: 17px; color: var(--text-sec); max-width: 640px; margin: 0 auto 36px; }
.hero-stats { display: flex; align-items: center; justify-content: center; gap: 0; }
.stat { text-align: center; padding: 0 32px; }
.stat-num { display: block; font-size: 32px; font-weight: 900; background: linear-gradient(135deg,#6C63FF,#3B82F6); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.stat-label { font-size: 12px; color: var(--text-sec); text-transform: uppercase; letter-spacing: 0.06em; }
.stat-sep { width: 1px; height: 48px; background: var(--border); }

/* ─── LAYOUT ─────────────────────────────────────────────────────────────── */
.main-content { max-width: 1280px; margin: 0 auto; padding: 48px 32px 80px; display: flex; flex-direction: column; gap: 28px; }

/* ─── PANELS ─────────────────────────────────────────────────────────────── */
.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.panel-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 28px 32px 24px;
  border-bottom: 1px solid var(--border-light);
  flex-wrap: wrap;
}
.panel-title-group { display: flex; align-items: center; gap: 16px; }
.panel-icon { font-size: 28px; line-height: 1; }
.panel-title { font-size: 20px; font-weight: 700; color: var(--text-primary); }
.panel-subtitle { font-size: 13px; color: var(--text-sec); margin-top: 4px; }
.panel-actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }

/* ─── BUTTONS ─────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-family: var(--font-main);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
  white-space: nowrap;
  text-decoration: none;
}
.btn-primary {
  background: linear-gradient(135deg, #6C63FF 0%, #3B82F6 100%);
  color: white;
  box-shadow: 0 4px 20px rgba(108,99,255,0.4);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 8px 32px rgba(108,99,255,0.55); filter: brightness(1.08); }
.btn-ghost {
  background: var(--bg-input);
  color: var(--text-sec);
  border: 1px solid var(--border);
}
.btn-ghost:hover { background: var(--bg-hover); color: var(--text-primary); border-color: rgba(108,99,255,0.4); }
.btn-add {
  background: rgba(108,99,255,0.12);
  color: #A5B4FC;
  border: 1px dashed rgba(108,99,255,0.45);
}
.btn-add:hover { background: rgba(108,99,255,0.22); border-style: solid; }
.btn-launch {
  width: 100%;
  justify-content: center;
  padding: 18px 32px;
  font-size: 16px;
  border-radius: var(--radius);
  margin: 0;
}
.btn-icon { font-size: 18px; }
.btn-arrow { margin-left: 4px; transition: transform 0.2s; }
.btn-launch:hover .btn-arrow { transform: translateX(4px); }

/* ─── URL SLOTS ───────────────────────────────────────────────────────────── */
.url-slots { display: flex; flex-direction: column; gap: 12px; padding: 24px 32px 0; }
.url-slot {
  display: flex;
  align-items: center;
  gap: 12px;
  animation: slideIn 0.25s ease;
}
@keyframes slideIn { from { opacity:0; transform: translateY(-8px); } to { opacity:1; transform:none; } }
.url-slot-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(108,99,255,0.15);
  border: 1px solid rgba(108,99,255,0.3);
  color: #A5B4FC;
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.url-slot-label-wrap { display: flex; flex-direction: column; flex: 1; gap: 4px; }
.url-slot-label { font-size: 12px; color: var(--text-sec); font-weight: 500; }
.url-input {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 13px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.url-input::placeholder { color: var(--text-muted); }
.url-input:focus {
  border-color: rgba(108,99,255,0.6);
  box-shadow: 0 0 0 3px rgba(108,99,255,0.15);
}
.url-input.error { border-color: var(--red); }
.url-remove {
  width: 32px;
  height: 32px;
  border: none;
  background: rgba(239,68,68,0.1);
  color: var(--red);
  border-radius: 6px;
  cursor: pointer;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  flex-shrink: 0;
}
.url-remove:hover { background: rgba(239,68,68,0.25); }

/* ─── URL PANEL FOOTER ───────────────────────────────────────────────────── */
.url-panel-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 32px;
}
.url-count { font-size: 13px; color: var(--text-muted); font-family: var(--font-mono); }

/* ─── CONFIG ─────────────────────────────────────────────────────────────── */
.config-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px,1fr));
  gap: 20px;
  padding: 20px 32px;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  background: rgba(108,99,255,0.04);
}
.config-label { display: block; font-size: 12px; font-weight: 600; color: var(--text-sec); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 10px; }
.slider-wrap { display: flex; align-items: center; gap: 12px; }
.slider {
  flex: 1;
  -webkit-appearance: none;
  height: 4px;
  border-radius: 2px;
  background: var(--bg-hover);
  outline: none;
  cursor: pointer;
}
.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: linear-gradient(135deg,#6C63FF,#3B82F6);
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(108,99,255,0.5);
}
.slider-val { font-family: var(--font-mono); font-size: 14px; font-weight: 700; color: var(--purple); min-width: 38px; }
.select {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 14px;
  outline: none;
  cursor: pointer;
}
.toggle-group { display: flex; gap: 0; border-radius: var(--radius-sm); overflow: hidden; border: 1px solid var(--border); }
.toggle-btn {
  flex: 1;
  padding: 9px 20px;
  background: transparent;
  border: none;
  color: var(--text-sec);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}
.toggle-btn.active { background: linear-gradient(135deg,#6C63FF,#3B82F6); color: white; }

/* ─── PROGRESS ───────────────────────────────────────────────────────────── */
.progress-panel { padding: 32px; }
.progress-header { display: flex; align-items: center; gap: 20px; margin-bottom: 24px; }
.progress-spinner {
  width: 40px; height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--purple);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }
.progress-bar-wrap { background: var(--bg-input); border-radius: 999px; height: 8px; overflow: hidden; margin-bottom: 20px; }
.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, #6C63FF, #3B82F6, #06B6D4);
  border-radius: 999px;
  transition: width 0.4s ease;
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}
@keyframes shimmer { 0%,100%{background-position:0% 50%} 50%{background-position:100% 50%} }
.progress-log { display: flex; flex-direction: column; gap: 8px; max-height: 200px; overflow-y: auto; }
.log-entry {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-sec);
  padding: 8px 12px;
  background: var(--bg-card);
  border-radius: 6px;
  border-left: 3px solid transparent;
  animation: fadeIn 0.3s ease;
}
.log-entry.done  { border-color: var(--green); color: var(--text-primary); }
.log-entry.warn  { border-color: var(--amber); }
.log-entry.error { border-color: var(--red); }
@keyframes fadeIn { from{opacity:0;transform:translateY(4px)} to{opacity:1;transform:none} }
.log-icon { font-size: 14px; }

/* ─── SUMMARY ROW ────────────────────────────────────────────────────────── */
.summary-row { display: grid; grid-template-columns: repeat(auto-fit,minmax(200px,1fr)); gap: 16px; }
.summary-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.summary-card::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.05;
}
.summary-card.c-purple::before { background: linear-gradient(135deg,#6C63FF,transparent); }
.summary-card.c-red::before    { background: linear-gradient(135deg,#EF4444,transparent); }
.summary-card.c-amber::before  { background: linear-gradient(135deg,#F59E0B,transparent); }
.summary-card.c-green::before  { background: linear-gradient(135deg,#22C55E,transparent); }
.summary-card.c-blue::before   { background: linear-gradient(135deg,#3B82F6,transparent); }
.summary-icon { font-size: 32px; margin-bottom: 12px; }
.summary-val { font-size: 36px; font-weight: 900; line-height: 1; margin-bottom: 6px; }
.summary-val.c-purple { color: var(--purple); }
.summary-val.c-red    { color: var(--red); }
.summary-val.c-amber  { color: var(--amber); }
.summary-val.c-green  { color: var(--green); }
.summary-val.c-blue   { color: var(--blue); }
.summary-label { font-size: 13px; color: var(--text-sec); font-weight: 500; }

/* ─── SIMILARITY MATRIX ──────────────────────────────────────────────────── */
.matrix-wrap { padding: 24px 32px; overflow-x: auto; }
.matrix-table { border-collapse: collapse; font-size: 12px; font-family: var(--font-mono); }
.matrix-table th, .matrix-table td { padding: 8px 12px; text-align: center; white-space: nowrap; }
.matrix-table th { color: var(--text-sec); font-weight: 600; background: var(--bg-card); }
.matrix-table th.row-header { text-align: left; max-width: 150px; overflow: hidden; text-overflow: ellipsis; }
.matrix-cell {
  border-radius: 4px;
  cursor: default;
  font-weight: 600;
  transition: transform 0.15s;
  position: relative;
}
.matrix-cell:hover { transform: scale(1.1); z-index: 10; }
.matrix-cell.self { background: rgba(255,255,255,0.05); color: var(--text-muted); }

/* ─── FILTER ROW ─────────────────────────────────────────────────────────── */
.filter-row { display: flex; gap: 6px; flex-wrap: wrap; }
.filter-btn {
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-sec);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}
.filter-btn.active, .filter-btn:hover { background: rgba(108,99,255,0.2); border-color: rgba(108,99,255,0.5); color: #A5B4FC; }

/* ─── STUDENT CARDS ──────────────────────────────────────────────────────── */
.cards-grid { padding: 24px 32px; display: grid; grid-template-columns: repeat(auto-fill,minmax(380px,1fr)); gap: 20px; }
.student-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}
.student-card:hover { transform: translateY(-2px); box-shadow: 0 8px 36px rgba(0,0,0,0.4); border-color: rgba(108,99,255,0.3); }
.student-card.risk-critical { border-top: 3px solid var(--risk-critical); }
.student-card.risk-high     { border-top: 3px solid var(--risk-high); }
.student-card.risk-medium   { border-top: 3px solid var(--risk-medium); }
.student-card.risk-low      { border-top: 3px solid var(--risk-low); }
.card-top { padding: 20px 20px 14px; display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.card-student-info { flex: 1; min-width: 0; }
.card-student-num { font-size: 11px; color: var(--text-muted); text-transform: uppercase; font-weight: 600; letter-spacing: 0.06em; margin-bottom: 4px; }
.card-student-url { font-family: var(--font-mono); font-size: 12px; color: var(--blue); text-decoration: none; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; display: block; }
.card-student-url:hover { text-decoration: underline; }
.card-title { font-size: 15px; font-weight: 700; margin-top: 4px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.card-risk-score { text-align: right; flex-shrink: 0; }
.risk-circle {
  width: 52px; height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 900;
  font-family: var(--font-mono);
}
.risk-circle.rc-critical { background: rgba(239,68,68,0.18);  color: var(--risk-critical); border: 2px solid rgba(239,68,68,0.4); }
.risk-circle.rc-high     { background: rgba(249,115,22,0.18); color: var(--risk-high);     border: 2px solid rgba(249,115,22,0.4); }
.risk-circle.rc-medium   { background: rgba(245,158,11,0.18); color: var(--risk-medium);   border: 2px solid rgba(245,158,11,0.4); }
.risk-circle.rc-low      { background: rgba(34,197,94,0.18);  color: var(--risk-low);      border: 2px solid rgba(34,197,94,0.4); }
.risk-label { font-size: 10px; text-align: center; margin-top: 4px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; }
.card-findings { padding: 0 20px 14px; display: flex; flex-direction: column; gap: 8px; }
.finding-item { display: flex; align-items: flex-start; gap: 10px; font-size: 13px; }
.finding-dot {
  width: 6px; height: 6px; border-radius: 50%;
  margin-top: 6px; flex-shrink: 0;
}
.finding-dot.fd-critical { background: var(--risk-critical); }
.finding-dot.fd-high     { background: var(--risk-high); }
.finding-dot.fd-medium   { background: var(--risk-medium); }
.finding-dot.fd-low      { background: var(--risk-low); }
.finding-dot.fd-info     { background: var(--blue); }
.finding-text { color: var(--text-sec); line-height: 1.5; }
.card-metrics { padding: 14px 20px; background: rgba(0,0,0,0.15); display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 8px; }
.metric { text-align: center; }
.metric-val { font-size: 18px; font-weight: 800; font-family: var(--font-mono); }
.metric-label { font-size: 10px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.04em; margin-top: 2px; }
.card-expand-btn {
  display: block;
  width: 100%;
  padding: 10px 20px;
  background: transparent;
  border: none;
  border-top: 1px solid var(--border-light);
  color: var(--text-sec);
  font-size: 12px;
  cursor: pointer;
  text-align: left;
  transition: background 0.2s, color 0.2s;
}
.card-expand-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.card-details { display: none; padding: 16px 20px; border-top: 1px solid var(--border-light); animation: fadeIn 0.2s; }
.card-details.open { display: block; }
.detail-section { margin-bottom: 14px; }
.detail-title { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.07em; color: var(--text-muted); margin-bottom: 8px; }
.detail-code {
  background: var(--bg-base);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-sec);
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 200px;
  overflow-y: auto;
}
.detail-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.detail-tag {
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  background: rgba(108,99,255,0.12);
  color: #A5B4FC;
  border: 1px solid rgba(108,99,255,0.2);
}

/* ─── MATCHED PASSAGES ───────────────────────────────────────────────────── */
#passagesList { padding: 0 32px 24px; display: flex; flex-direction: column; gap: 16px; }
.passage-card {
  background: var(--bg-card);
  border: 1px solid rgba(239,68,68,0.25);
  border-left: 4px solid var(--red);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
}
.passage-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; flex-wrap: wrap; gap: 8px; }
.passage-students { font-size: 13px; font-weight: 700; color: var(--text-primary); }
.passage-similarity { font-family: var(--font-mono); font-size: 14px; font-weight: 800; color: var(--red); }
.passage-text {
  background: var(--bg-base);
  border-radius: 6px;
  padding: 14px;
  font-size: 13px;
  color: var(--text-sec);
  line-height: 1.7;
  border-left: 2px solid rgba(239,68,68,0.4);
  font-family: var(--font-mono);
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 160px;
  overflow-y: auto;
}
.passage-highlight { background: rgba(239,68,68,0.2); color: #FCA5A5; border-radius: 2px; padding: 0 2px; }
.no-matches { padding: 32px; text-align: center; color: var(--text-muted); }

/* ─── EXPORT PANEL ───────────────────────────────────────────────────────── */
.export-panel { background: linear-gradient(135deg, rgba(108,99,255,0.08), rgba(59,130,246,0.05)); }
.export-inner { padding: 32px; display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.export-icon { font-size: 48px; flex-shrink: 0; }
.export-title { font-size: 20px; font-weight: 700; margin-bottom: 6px; }
.export-desc { font-size: 13px; color: var(--text-sec); }
.export-btns { display: flex; gap: 12px; margin-left: auto; flex-wrap: wrap; }

/* ─── FOOTER ─────────────────────────────────────────────────────────────── */
.site-footer { border-top: 1px solid var(--border); padding: 28px 32px; text-align: center; }
.site-footer p { color: var(--text-muted); font-size: 13px; }
.footer-sub { margin-top: 6px; font-size: 11px; color: rgba(91,98,128,0.7); }

/* ─── HELPERS ────────────────────────────────────────────────────────────── */
.hidden { display: none !important; }
.tooltip {
  position: relative;
  cursor: help;
}
.tooltip::after {
  content: attr(data-tip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 6px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
  z-index: 200;
}
.tooltip:hover::after { opacity: 1; }

/* ─── RESPONSIVE ─────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .header-inner { padding: 0 16px; }
  .hero { padding: 48px 16px 40px; }
  .main-content { padding: 28px 16px 60px; }
  .panel-header { padding: 20px; }
  .url-slots { padding: 16px 20px 0; }
  .url-panel-footer { padding: 14px 20px; }
  .config-row { padding: 16px 20px; }
  .cards-grid { padding: 16px 20px; grid-template-columns: 1fr; }
  .matrix-wrap { padding: 16px 20px; }
  #passagesList { padding: 0 20px 20px; }
  .export-inner { padding: 24px 20px; }
  .export-btns { margin-left: 0; width: 100%; }
  .hero-stats { flex-wrap: wrap; gap: 12px; }
  .stat-sep { display: none; }
  .brand-sub { display: none; }
}

/* ─── PRINT STYLES ───────────────────────────────────────────────────────── */
@media print {
  body { background: white; color: black; }
  .site-header, .hero, .url-panel, .progress-panel, .export-panel, .btn { display: none !important; }
  .panel { border: 1px solid #ccc; box-shadow: none; background: white; }
  .student-card { break-inside: avoid; }
}